AXD THEIR MANAGEMENT. 489 



Tliunia. 



at the edge. A native of Moulmein. Syn. T//a/i/s Mars/ia/Z/u-. 

 (W. O. A., t. 130.) 



Garden Hybrids. 



Vcitchii IniisoiicT and Marshalliaii.i. 



T. iim-rsa J/arshaUiaiia and Bciisoiuc. 



T. siiptiba / 'citchii and Bensona. 



Wri^h-vaihi Syn. Vt-ifdiii. 



TRIAS. 



Lindle\- fotmclecl thi.s small genus of creeping Orchids 

 belonging to the tribe E/<idciidrac. The name is from 

 trcis, three ; and is in allusion to the frequent disposition 

 of the blossoms. The species are natives of Moulmein and 

 the East Indian Peninsula. Sepals sub-equal, spreading, 

 the lateral ones adnate at base of the column ; petals 

 small, oblong or linear; lip slightl}- spreading at the apex, 

 narrow, rather thick ; scapes lateral, slender, leafless, one- 

 flowered. Pseudo-bulbs rather small, sub-globose, one-Iea\-ed 

 at the apex. These plants require intermediate-house 

 treatment, and a compost of equal portions peat and 

 sphagnum. 



TRICHOCENTRUM. 



About a dozen species of warm, intermediate-house, 

 epiph\-tal Orchids, belonging to the tribe l^andect;, are 

 included here. The name gi\-en b\- Pceppig and End- 

 licher is from thrix, triclios, a hair, and kciitron, a spur ; 

 and is in allusion to the long thin spur of the labellum. 

 The species are nati\-es of tropical America. Flowers 

 mediocre or rather large ; sepals and petals sub-equal, free, 

 spreading ; lip at base connate with the column, forming 

 a pitcher, produced into a descending spur, abo\-e the 

 pitcher erect, biauriculate, or naked ; lateral lobes scarcely- 

 dilated, nearly erect ; column short, thick ; pollen-masses 

 two, ovoid ; scapes short, many-sheathed, one- or rarely 

 two-flowered. Lea\-es coriaceous. Stems very short, 

 one-leaved, at length thickening into a small, fleshy 

 pseudo-bulb. The species, which are chiefly of botanic 

 interest, thrive best suspended in pans or baskets in a 

 moist position of the intermediate-house. They require a 

 liberal supply of root moisture at all seasons of the year. 



